Remember that we have this very useful FCP with us.
http://nitue.net/#fcp/indexSometime you find some builds through "Browse", of course most them is protected by password
What you have to know about throwing builds..
1 ) More ST you have, longer throw you have. Remember to use Heave Ho! perks too.
2 ) If you going throwing something to different spots than in "torso" you should take 7-8PE
3 ) If you just want have build that throw grenades and do damage, remember to take "Fast Shot" trait.
4 ) Luck is also good thing for throwers, critical from plasma grenade is pretty good.
5 ) Mostly throwers have low HP, because they use SPECIAL to other stats.
6 ) Enough skill for throwing is 150-200%
7 ) You need 10-12AP atleast, more AP with Jet if you really want throw things.
8 ) Intelligence as you get enough throwing skill -> 1-4 IN is enough.
You can see "Basic thrower" build on FCP, when you use "Browse"